Who Is It For?

NETWORK+ Terms B's Flashcards Preview

In ISDN, a 64Kbps channel that carries data.See also D (delta) channel.

B (bearer) channel

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A network segment that acts as a trunk between other network segments. ______ typically are high-bandwidth implementations such as fiber-optic cable.

backbone

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A document or plan that defines what type of ______ are made, when, and what datais backed up.

backup schedule

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The width of the rangeof electrical frequencies, or howmany channels the medium can support._______ correlates to theamount of data that can traverse themedium at one time, but other factorsdetermine the maximum speedsupported by a cable .

bandwidth

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A term applied to any medium that can carry only a single data signal at a time. Compare with broadband.

baseband

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A measurement of performanceof a device or system forthe purposes of future comparison._____ is a common serveradministration task.

In a wireless network,_____ refers to the continuoustransmission of small packets (beacons)that advertise the presence ofa base station (access point).

beaconing

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A test to see the number of received bits ofa data stream that has changed dueto noise, interference, or other distortion.

BERT (Bit-Error Rate Test)

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Used between gateway hosts on theInternet. _____ ____ ____ examines the routing table, which contains a list of knownrouters, the addresses they canreach, and a cost metric associatedwith the path to each router so thatthe best available route is chosen.It communicates between therouters using TCP.

biometrics

A basic set of instructions that adevice needs to operate.

BIOS (Basic Input/Output System)

An electronic digit used in thebinary numbering system. ____ is acontraction of the terms binary anddigit.

bit

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A total loss of electricalpower.

blackout

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A low-cost, short-rangeRF technology designed to replacemany of the cords used to connectdevices. It uses 2.4GHz RFand provides transmission speeds upto 24Mbps.

Bluetooth

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A family of connectorstypically associated with thin coaxialcabling and 10Base2 networks. ___connectors use a twist-and-lockmechanism to connect devices tothe network.

BNC (Bayonet Neill Concelman)connector

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______ is a TCP/IP protocolused by a network device toobtain an IP address and other networkinformation such as serveraddress and default gateway.

BOOTP

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Describes any medium that has physical constraints, such as coaxial, fiber-optic,and twisted pair. Compare withunbound medium.

bound medium

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Identifies the status of ports andbridges across the network. ____are simple data messages exchangedbetween switches. They containinformation on ports and providethe status of those ports to otherswitches.

BPDU (Bridge Protocol Data Unit)

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An ISDN digital communications linethat consists of three independentchannels: two B channels each at64Kbps and one D channel at16Kbps. ____ ____is often referredto as 2B+D.

BRI (Basic Rate Interface)

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A device that connects andpasses packets between two networksegments that use the same communicationsprotocol. ____ operateat the data link layer of the OSImodel; filters, forwards, orfloods an incoming frame based onthe packet’s MAC address.

bridge

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A list of MAC addresses that a bridge keepsand uses when it receives packets.The bridge uses the ____ ____ ____ to determine which segmentthe destination address is on before itsends the packet to the next interfaceor drops the packet (if it is on thesame segment as the sending node).

bridging address table

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A communications strategy that uses analog or digital signaling over multiple communicationschannels.

broadband

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A packet-delivery systemin which a copy of a packet istransmitted to all hosts attached tothe network.

broadcast

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An undesirable condition in which broadcasts become so numerous that they bog down theflow of data across the network.

broadcast storm

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A device that you can useto combine the benefits of bothrouters and bridges. Its commonusage is to route routable protocolsat the network layer of the OSImodel and to bridge nonroutableprotocols at the data link layer.